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<?php class Singleton { private static $instance; private function __construct() { echo 'NEW', PHP_EOL; } public static function getInstance() { if (null === self::$instance) { self::$instance = new self(); } return self::$instance; } } $cl = static function() { return new Singleton(); }; $bcl = Closure::bind($cl, null, 'Singleton'); var_dump(Singleton::getInstance()); var_dump(Singleton::getInstance()); var_dump(Singleton::getInstance()); var_dump($bcl()); var_dump($bcl());
Output for git.master, git.master_jit, rfc.property-hooks
NEW object(Singleton)#3 (0) { } object(Singleton)#3 (0) { } object(Singleton)#3 (0) { } NEW object(Singleton)#4 (0) { } NEW object(Singleton)#4 (0) { }

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